pythm error

I installed pythm on my OM2007.2, but I get the following error:
root at om-gta02:~# pythm-bin
(pythm-bin:1711): Gdk-WARNING **: Connection to display localhost:10.0
appears to be untrusted. Pointer and keyboard grabs and inter-client
communication may not work as expected.
Traceback (most recent call last):
File "/usr/bin/pythm-bin", line 14, in <module>
main()
File "/usr/bin/pythm-bin", line 8, in main
from pythm import startPythm
File "/usr/lib/python2.5/site-packages/pythm/__init__.py", line 1, in
<module>
from pythm import *
File "/usr/lib/python2.5/site-packages/pythm/pythm.py", line 1, in
<module>
import gtkgui
File "/usr/lib/python2.5/site-packages/pythm/gtkgui/__init__.py", line 1,
in <module>
from pythmgtk import *
File "/usr/lib/python2.5/site-packages/pythm/gtkgui/pythmgtk.py", line 6,
in <module>
from pagelist import *
File "/usr/lib/python2.5/site-packages/pythm/gtkgui/pagelist.py", line 4,
in <module>
from pythm.backend import Signals
File "/usr/lib/python2.5/site-packages/pythm/backend/__init__.py", line 1,
in <module>
from backend import *
File "/usr/lib/python2.5/site-packages/pythm/backend/backend.py", line 2,
in <module>
from threading import Thread,Lock
ImportError: No module named threading
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